CVE-2021-24540 : What You Need to Know

The Wonder Video Embed WordPress plugin before version 1.8 is vulnerable to Stored Cross-Site Scripting (XSS) attacks, allowing users with low-level roles like Contributor to exploit it.

Understanding CVE-2021-24540

This CVE affects the Wonder Video Embed plugin for WordPress, enabling contributors to execute XSS attacks.

What is CVE-2021-24540?

The vulnerability in Wonder Video Embed plugin allows users with low privileges to carry out Stored XSS attacks by exploiting the wonderplugin_video shortcode.

The Impact of CVE-2021-24540

A successful attack could result in malicious code injection, compromising the security and integrity of the WordPress site and potentially impacting site visitors.

Technical Details of CVE-2021-24540

The following are the technical details of the CVE:

Vulnerability Description

The Wonder Video Embed plugin version 1.8 and below fail to properly escape parameters, leading to potential XSS attacks.

Affected Systems and Versions

Affected Product: Wonder Video Embed
Vendor: Unknown
Versions: < 1.8

Exploitation Mechanism

An attacker with a user role as low as Contributor can insert malicious code via the wonderplugin_video shortcode, triggering a Stored XSS attack.

Mitigation and Prevention

To safeguard your WordPress site from CVE-2021-24540, follow these security measures:

Immediate Steps to Take

Update the Wonder Video Embed plugin to version 1.8 or newer.
Restrict user roles and permissions to minimize the impact of potential attacks.

Long-Term Security Practices

Regularly monitor and audit plugins for security vulnerabilities.
Educate users on best practices to prevent XSS attacks.

Patching and Updates

Stay informed about security patches and updates for all WordPress plugins to mitigate the risk of exploitation.